Wrench and straightener for thrashing-machine teeth



(No Model.)

. E. W. OAKEY. WRENCH AND STRAIGHTENER FOR THRASHING MACHINE TEETH. No. 518,328.

Patented Apr. 17, 1894.

{ INIVENTOIH ATTORNEY.

teeth in place.

UNrran STATES EDWARD WV. OAKEY, OF OHATFIELD, MINNESOTA.

WRENCH AND STRAIGHTENER FOR THRASHlNG-MACHINE TEETH.

SPECIFICATION forming part of Letters Patent No. 518,328, dated April 17, 1894.

Application filed December 12,1893. Serial No. 493,455- (No model.)

To aZZ whom, it may concern:

Be it known that I, EDWARD W. OAKEY, re-

siding at Ohatfield, in the county of Fillmore and State of Minnesota, have invented certain new and useful Improvements in Wrenches and Straighteners for Thrashing-Machine Teeth,of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to tools for setting, tightening, and straightening the teeth of thrashing machine's.

The object of the invention is to produce a tool which may be conveniently applied as a wrench to turn the nuts on thrashing machine teeth, and also to straighten teeth in the cylinder or concave which may have become bent or twisted.

Figure 1 is a perspective view of my improved tool. Fig. 2 is aback or top view of the same. Fig. 3 is an edge view; Fig. 4 a face view of the nut clasping jaw and part of its shank. Fig. 5 is an edge view of same. Fig. 6 isa broken perspective of tooth straightening end.

Thrashing machine cylinders are often composed of a skeleton frame work, having longitudinal bars, in which are polygonal holes, in which the polygonal shanks of the teeth are held. The shanks of the teeth terminate in screw threaded portions, extending through the bars of the cylinder, and nuts on these threaded shanks, inside the cylinder, hold the The wrench must be passed between the bars of the cylinder to reach and turn the nuts, at the central parts of the cylinder. This may be readily done with the tool about to be described.

The wrench head, A, is preferably a socket which embraces the nut on all sides. I have shown a wrench head with an opening, B, having eight corners or notches. These are adapted to fit over the corners of a square nut, and the head is readily adjusted and changed in its position relatively to the nut. For a hexagonal nut the shape of the opening in the wrench head might be changed. The face, C, of the wrench head, surrounding the opening B, is made convex, so that the head may embrace the nut close to the bar of the cylinder, and also so that the hold on the nut may be maintained notwithstanding aslight rocking of the handle of the wrench. The handle, D, extends from one side of the wrench head, and for a little distance this handle is about in the plane of the wrench head, and

is oval or elliptic in cross section, as at cl, so

that the handle may be used as a lever to turn the nut to the greatest extent before the edge or corner thereof comes in contact with the bars of the cylinder. At a little distance from the wrench head the handle makes a sharp bend, as at e, and after extending in a 'direction nearly at a right angle to the head, A, for a few inches, the handle makes another sharp turn, as at f, but this angle is preferably a little greater than the angle at e, so

that the handle in its extension again approaches the plane of the wrench head, as plainly shown in Fig. 3, the handle thus having a return bend-of goose neck, about as" shown in Fig. 3. When the handle approximates the plane of the head, it is preferably again slightly bent, as at 9, so that the further continuation of the handle is about in the plane of the head, as at h, Fig. 2. The end of the wrench handle turns at about a right angle, as at I. This extended portion has a rectangular mortise K, close to the main bar. This mortise can be passed over the outer end of a tooth, and the leverage of the handle exerted on the tooth to straighten the same. Near the outer end of the handle there is formed a rectangular mortiseL, in the part, h, of the handle. This mortise can be passedover the tooth,- and the leverage of the handle used to twist-on the tooth so as to straighten by torsional strain any tooth which may have become bent.

From the foregoing description it is believed the construction and manner of using this tool will be apparent.

erably integral.

It will of course be understood that the material of which the. tool is made will bea metalof adequate strength; that the size will The tool is prefgnlar mortise near the end opposite the wrench connected to said stem, all substantially as 120 head, and a terminal portion about at right described. angles to the Wrench head which is also pro- In testimony whereof I affix my signature in vided with arectangular mortise, all substanpresence of two Witnesses.

5 tially as shown and described.

2. The Wrench for thrashing machine teeth EDWARD OAKEY' having an opening with eight corners or W'itnesses: notches and a convex face, an oval stern inte- F. V. EDWARDS,

gral with said head, and a goose-neck handle E. M. EDWARDS. 

